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A189428 Number of n X n array permutations with each element not moving, or moving one space N, SW or SE 0

%I #6 Dec 18 2015 18:17:38

%S 1,2,9,140,5680,606201,181540773,150293731826,343426652577376

%N Number of n X n array permutations with each element not moving, or moving one space N, SW or SE

%C Diagonal of A189435

%e Some solutions for 3X3

%e ..0..4..2....0..1..2....0..1..2....0..1..2....0..1..5....0..4..5....3..1..2

%e ..3..7..1....3..4..5....6..7..5....3..7..8....3..2..8....3..2..1....6..0..5

%e ..6..5..8....6..7..8....4..3..8....6..5..4....6..7..4....6..7..8....4..7..8

%K nonn

%O 1,2

%A _R. H. Hardin_ Apr 22 2011

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Last modified March 29 09:32 EDT 2024. Contains 371268 sequences. (Running on oeis4.)